[Event "Niedersachsen-ch op"]
[Site "Verden"]
[Date "2007.01.07"]
[Round "7"]
[White "Jahn, David"]
[Black "Kaiser, Jonas"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1276"]
[BlackElo "1555"]
[PlyCount "72"]
[EventDate "2007.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 Ne7 4. Bd3 b6 5. b4 Nd7 6. c3 Bb7 7. Ne2 c5 8. bxc5 bxc5 9. Be3 Nc6 10. 0-0 Be7 11. f4 cxd4 12. cxd4 g6 13. Nbc3 Nb6 14. Rb1 Qc8 15. Na4 Nxa4 16. Qxa4 Qd7 17. Rfc1 0-0 18. Rxb7 Qxb7 19. Qxc6 Rab8 20. a4 Qb3 21. Qc2 Qa3 22. Bd2 Rb2 23. Qxb2 Qxb2 24. Rc2 Qa1+ 25. Kf2 Qxa4 26. Bc3 Rb8 27. g3 a5 28. Ke3 Bb4 29. Rb2 Qc6 30. Be1 Qc7 31. Bxb4 Rxb4 32. Ra2 a4 33. Bc2 Qa5 34. Nc3 Qb6 35. Nxa4 Qxd4+ 36. Kf3 Qc4 0-1

[Event "Niedersachsen-ch op"]
[Site "Verden"]
[Date "2007.01.05"]
[Round "5"]
[White "Jahn, David"]
[Black "Fischer, Manfred"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "1276"]
[BlackElo "1644"]
[PlyCount "46"]
[EventDate "2007.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bd3 Be7 7. 0-0 Nc6 8. Nce2 0-0 9. f4 Qb6 10. Be3 Ng4 11. Nxc6 Qxe3+ 12. Kh1 bxc6 13. Ng3 Nf2+ 14. Rxf2 Qxf2 15. f5 exf5 16. exf5 d5 17. Qh5 Bf6 18. Rf1 Qd4 19. Rf3 Qh4 20. Qxh4 Bxh4 21. Nh5 Bd7 22. f6 g6 23. Rf4 Bg5 0-1

[Event "Niedersachsen-ch op"]
[Site "Verden"]
[Date "2007.01.05"]
[Round "3"]
[White "Jahn, David"]
[Black "Vogel, Jannis"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1276"]
[PlyCount "101"]
[EventDate "2007.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 h6 4. 0-0 Bc5 5. c3 Nf6 6. d4 Bd6 7. d5 Na5 8. Bd3 c6 9. b4 cxd5 10. exd5 e4 11. Re1 0-0 12. Bxe4 Nc4 13. Qd4 b5 14. a4 Ba6 15. axb5 Bxb5 16. Rxa7 Qb6 17. Qxb6 Nxb6 18. Rxa8 Rxa8 19. Na3 Ba6 20. Nd4 Nxe4 21. Rxe4 Nxd5 22. Nab5 Bb8 23. f3 g5 24. Re2 Nxc3 25. Re8+ Kh7 26. Nxc3 Bd3 27. Re7 Ra1 28. Nce2 Ba7 29. Kf2 Bxd4+ 30. Nxd4 Rxc1 31. Rxf7+ Kg6 32. Rxd7 h5 33. Rd6+ Kf7 34. b5 Rf1+ 35. Ke3 Bc4 36. Rc6 Re1+ 37. Kd2 Bxb5 38. Kxe1 Bxc6 39. Nxc6 Kf6 40. Kf2 Kf5 41. Ke3 Kf6 42. Ke4 Ke6 43. g3 Kf6 44. f4 Kg6 45. f5+ Kf6 46. Nd4 g4 47. Ne2 Kg5 48. Ke5 h4 49. f6 Kh5 50. f7 hxg3 51. hxg3 1-0

[Event "Niedersachsen-ch op"]
[Site "Verden"]
[Date "2007.01.05"]
[Round "6"]
[White "Pfeifer, Frank"]
[Black "Jahn, David"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1673"]
[BlackElo "1276"]
[PlyCount "55"]
[EventDate "2007.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. g3 b6 4. Bg2 Bb7 5. d3 Nf6 6. Nge2 d6 7. 0-0 Be7 8. f4 Nbd7 9. Be3 Ng4 10. Bf2 Nxf2 11. Rxf2 0-0 12. Qd2 e5 13. Raf1 f6 14. f5 a6 15. Rf3 Qc7 16. g4 c4 17. Rh3 Rac8 18. Qe1 cxd3 19. cxd3 b5 20. Qh4 h6 21. Rc1 Nc5 22. b4 Nd7 23. Qh5 Qb6+ 24. Kh1 Rfd8 25. Qg6 Nf8 26. Qh5 Rc7 27. Qh4 Rdc8 28. Qe1 1/2-1/2

[Event "Niedersachsen-ch op"]
[Site "Verden"]
[Date "2007.01.05"]
[Round "4"]
[White "Schultheiss, Martin"]
[Black "Jahn, David"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1598"]
[BlackElo "1276"]
[PlyCount "74"]
[EventDate "2007.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Be2 Nf6 6. Nc3 Qc7 7. Be3 b6 8. Qd2 Bb7 9. 0-0-0 Nxe4 10. Nxe4 Bxe4 11. Nf3 Be7 12. Bf4 Qb7 13. Rhe1 0-0 14. Bg3 d5 15. Nd4 Bf6 16. f3 Bg6 17. Bd3 Bxd4 18. Bxg6 Bxb2+ 19. Kxb2 hxg6 20. Qg5 Nc6 21. h4 Qe7 22. Rxd5 Qxg5 23. Rxg5 Rac8 24. Rh1 b5 25. h5 gxh5 26. Rgxh5 f6 27. Bd6 Rfd8 28. Bf4 Kf7 29. Rh7 e5 30. Bh6 Rg8 31. Be3 Na5 32. Bf2 Nc4+ 33. Kc1 Na3 34. Bg3 Rxc2+ 35. Kd1 Rd8+ 36. Ke1 Rdd2 37. R1h4 Nb1 0-1

[Event "Niedersachsen-ch op"]
[Site "Verden"]
[Date "2007.01.04"]
[Round "1"]
[White "Jahn, David"]
[Black "Von Hoersten, Juergen"]
[Result "0-1"]
[ECO "B33"]
[WhiteElo "1276"]
[BlackElo "1770"]
[PlyCount "72"]
[EventDate "2007.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Nb3 b5 7. f3 e6 8. Be3 Qc7 9. Be2 Bb7 10. g4 d6 11. g5 Nd7 12. Qd2 Nce5 13. a3 Nc4 14. Bxc4 Qxc4 15. Na5 Qc7 16. Ne2 Ne5 17. Nd4 Rc8 18. Nxb7 Qxb7 19. Qg2 Nc4 20. Bc1 g6 21. c3 Bg7 22. h4 Qb6 23. Qf2 Bxd4 24. Qxd4 Qxd4 25. cxd4 Na5 26. Be3 Nb3 27. Rb1 Rc4 28. d5 Kd7 29. Rh2 exd5 30. exd5 Re8 31. Re2 Rxh4 32. Kf2 Rh2+ 33. Kf1 Rh1+ 34. Bg1 Rxg1+ 35. Kxg1 Rxe2 36. f4 Rd2 0-1

[Event "Niedersachsen-ch op"]
[Site "Verden"]
[Date "2007.01.04"]
[Round "2"]
[White "Raum, Sebastian"]
[Black "Jahn, David"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "1634"]
[BlackElo "1276"]
[PlyCount "31"]
[EventDate "2007.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 d6 7. Be3 Be7 8. Bd3 b6 9. 0-0 Bb7 10. f4 Qc7 11. f5 exf5 12. Nxf5 0-0 13. Bd4 Bd8 14. Nxg7 Kxg7 15. Qg4+ Kh6 16. Be3# 1-0

